TI PCM6480QRTVRQ1

PCM6480-Q1 is a high-performance audio converter supporting synchronous sampling of up to 4 channels of analog microphone inputs, line inputs, or PDM microphone inputs. This integrated device efficiently enables in-vehicle ANC and VR applications by simultaneously sampling both analog and digital microphone inputs. The PCM6480-Q1 incorporates high-performance audio ADCs supporting analog input signals up to 10VRMS. The device features integrated high-voltage programmable microphone bias and input diagnostic circuitry for direct connection to microphone-based automotive systems, providing comprehensive DC-coupled input fault diagnostics. An integrated high-efficiency boost converter generates the high-voltage microphone bias from an external low-voltage 3.3V supply readily available within the system. The PCM6480-Q1 integrates programmable channel gain, digital volume control, a low-jitter PLL, programmable HPF, biquad filters, low-latency filter mode, and supports sampling rates up to 768kHz. The PCM6480-Q1 supports TDM, I2S, or Left-Justified (LJ) audio formats, with control via I2C or SPI interfaces.

• AEC-Q100 qualified for automotive applications
• Temperature Grade 1: -40°C ≤ TA ≤ +125°C
• Up to 8-channel simultaneous audio conversion
• 4-channel analog microphone or line input
• 4-channel digital PDM microphone input
• ADC performance:
  • Line differential input dynamic range: 110dB
  • Microphone differential input dynamic range: 110dB
  • THD+N: -95dB
• ADC analog input voltage:
  • Differential 10VRMS full-scale input
  • Single-ended 5VRMS full-scale input
• ADC sample rate (fS) = 8kHz to 768kHz
• Programmable channel settings:
  • Analog input channel gain: 0dB to 42dB
  • Digital volume control: –100dB to 27dB
  • Gain calibration resolution: 0.1dB
  • Phase calibration resolution: 163ns
• Programmable microphone bias (5V to 9V)
• Programmable microphone analog input fault diagnostics:
  • Open or short-circuit input to GND, MICBIAS, or VBAT
  • Microphone bias overcurrent protection
• Low-latency signal processing filter selection
• Programmable HPF and biquad digital filters
• I2C or SPI control
• Audio serial data interface:
  • Format: TDM, I2S, or Left-Justified (LJ)
  • Word length: 16-bit, 20-bit, 24-bit, or 32-bit
  • Master/slave interface
• 3.3V single-supply operation
• I/O supply operation: 3.3V or 1.8V
• Power consumption: < 20mW/channel at 48kHz

• Automotive active noise cancellation
• Automotive head unit
• Digital cockpit processing unit
• Automotive external amplifier